Arduino I2c slave to Raspberry pi Master

[zedfx]

Hi, Has anyone successfully transmitted more that 1 byte from an arduino slave to a raspberry pi master??

i am trying to send 4 floats as 16 bytes when requested, to a raspberry pi where they are reconstructed back to the four floats.

i have managed to do this from an arduino to another arduino over i2c but not to a raspberry pi.

i know this is strictly not just an arduino problem, but like me many of you use them in tandem.

i need to use standard libaries on the raspberry pi as it also has an i2c realtime clock.

thanks in advance for any help

[pylon]

Do you have problems transmitting more than one byte or re-combining the bytes to a correct float type on the Pi?

Post your current code!

[zedfx]

Hi, im using unions to split and recombine the floats and using two arduinos it works fine, as far as i can see the raspberry pi is requesting data and it receives the first byte and then it fails.

[srnet]

I would suggest getting your master slave communication working between two raspberry Pis.

Far easier to troubleshoot a problem on a single platform.

[pylon]

Still not seen the code.

[zedfx]

thanks will try that, sorry code is on another machine not accessable from here